The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2019
Filed:
Jun. 23, 2016
Dow Global Technologies Llc, Midland, MI (US);
Otto J. Berbee, Terneuzen, NL;
Cornelis F. J. Den Doelder, Terneuzen, NL;
Stefan Hinrichs, Terneuzen, NL;
Teresa P. Karjala, Freeport, TX (US);
John O. Osby, Freeport, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Ethylene-based polymers comprising the following properties: (A) a density from 0.9190 g/cc to 0.9240 g/cc; (B) a hexane extractable level that is less than or equal to the lower of: (1) (A+(B*density (g/cc))+(C*log(MI) dg/min)) based on total weight of the ethylene-based polymer; where A=250.5 wt %, B=−270 wt %/(g/cc), C=0.25 wt %/[log(dg/min)], or (2) 2.0 wt %; (C) a G' (at G″=500 Pa, 170° C.) that meets the following equation: G′≥D+E[log (12)], where D=150 Pa and E=−60 Pa/[log(dg/min)]; and (D) a melt index () from 1.0 to 20 dg/min; are made in process comprising the step of contacting in a reaction configuration, comprising a first tubular reaction zoneand a last tubular reaction zone i, in which i is greater than or equal to (≥) 3, under high pressure polymerization conditions, and in which the first reaction zonehas a peak polymerization temperature greater than the peak temperature of the ith reaction zone, and wherein the difference in these two peak temperatures is ≥30° C.